:root{--bg: #f5f7fb;--bg-accent: #e8eef8;--surface: rgba(255, 255, 255, .96);--surface-alt: #eef3f9;--surface-soft: #ffffff;--ink: #162032;--muted: #5e6b7e;--line: rgba(100, 116, 139, .18);--accent: #2563eb;--accent-strong: #1d4ed8;--accent-soft: rgba(37, 99, 235, .08);--shadow: 0 18px 40px rgba(15, 23, 42, .08)}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at top,rgba(59,130,246,.12),transparent 35%),linear-gradient(180deg,var(--bg-accent),var(--bg));color:var(--ink);font-family:Arial,sans-serif}button,input,select,textarea{font:inherit}a{color:var(--accent-strong)}#root{min-height:100vh}.shell{width:min(760px,calc(100% - 24px));margin:12px auto 28px;padding:18px;border:1px solid var(--line);border-radius:20px;background:var(--surface);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.hero,.selector-panel,.converter-panel,.table-card{border:1px solid var(--line);border-radius:18px;background:var(--surface);box-shadow:0 8px 20px #0f172a0a}.hero{margin-bottom:14px;padding:18px}.hero-top{display:flex;align-items:flex-start;gap:16px}.hero-logo-link{display:inline-block}.hero-logo{display:block;width:auto;max-width:min(200px,100%);height:auto;margin:0 0 10px}h1,h2,h3,p{margin-top:0}h1{margin-bottom:8px;font-size:clamp(1.8rem,4vw,2.5rem)}h2{margin-bottom:6px;font-size:1.2rem}.hero p,.selector-copy p,.converter-intro p,.table-card p,.footer,label,.formula{color:var(--muted)}.selector-panel,.converter-panel{padding:16px}.selector-panel{margin-bottom:14px}.selector-copy{margin-bottom:12px}.category-tabs{display:flex;gap:10px;overflow-x:auto;padding-bottom:4px;scrollbar-width:thin}.category-tab{flex:0 0 auto;padding:10px 14px;border:1px solid var(--line);border-radius:999px;background:var(--surface-soft);color:var(--ink);cursor:pointer;white-space:nowrap}.category-tab.is-active{border-color:var(--accent);background:var(--accent);color:#fff}.converter-panel{margin-bottom:16px}.converter-intro{margin-bottom:12px}.hero-result{margin-bottom:14px;padding:16px;border:1px solid var(--line);border-radius:16px;background:linear-gradient(135deg,var(--accent-soft),rgba(255,255,255,.9))}.hero-result-label,.hero-result-unit{display:block}.hero-result-label{margin-bottom:6px;color:var(--muted);font-size:.86rem;text-transform:uppercase;letter-spacing:.08em}.hero-result strong{display:block;font-size:clamp(1.8rem,6vw,2.6rem);line-height:1}.hero-result-unit{margin-top:8px;color:var(--muted)}.converter{display:grid;gap:12px}.field-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}label{display:block;margin-bottom:6px;font-size:.9rem}input,select{width:100%;padding:12px;border:1px solid var(--line);border-radius:12px;color:var(--ink);background:var(--surface-soft);-webkit-appearance:none;-moz-appearance:none;appearance:none}input:focus,select:focus,.category-tab:focus{outline:2px solid rgba(37,99,235,.25);outline-offset:1px;border-color:var(--accent-strong)}.keypad{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.keypad-button{min-height:54px;border:1px solid var(--line);border-radius:14px;background:var(--surface-soft);color:var(--ink);cursor:pointer;font-size:1.05rem;font-weight:600}.keypad-button.is-action{background:var(--surface-alt);color:var(--accent-strong)}.keypad-button.is-wide{background:linear-gradient(135deg,#2563eb1f,#2563eb0a)}.keypad-button:hover{border-color:#2563eb59}.keypad-button:focus{outline:2px solid rgba(37,99,235,.25);outline-offset:1px;border-color:var(--accent-strong)}.results{display:grid;gap:10px}.result-item{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:var(--surface-alt)}.result-item.is-active{border-color:#2563eb4d;background:#2563eb14}.result-item span{text-align:right;font-variant-numeric:tabular-nums}.formula{margin-top:14px;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:var(--accent-soft);font-size:.92rem}.formula div+div{margin-top:6px}.reference{display:grid;gap:14px}.table-card{overflow:hidden}.table-card h3{padding:16px 16px 0}.table-card p{margin:8px 16px 14px;font-size:.92rem}table{width:100%;border-collapse:collapse;font-size:.9rem}th,td{padding:10px 12px;border:1px solid #eef2f6;text-align:left}th{color:#fff;background:var(--accent)}td{background:var(--surface-soft)}.footer{margin:18px 4px 0;text-align:center;font-size:.88rem}@media(max-width:640px){.shell{width:min(100% - 12px,760px);margin:6px auto 18px;padding:10px;border-radius:14px}.hero,.selector-panel,.converter-panel,.table-card{border-radius:14px}.hero,.selector-panel,.converter-panel{padding:12px}.hero-logo{max-width:150px}.field-row{grid-template-columns:1fr}.keypad{gap:8px}.keypad-button{min-height:50px;border-radius:12px}.result-item{flex-direction:column;align-items:flex-start}.result-item span{text-align:left}th,td{padding:9px 10px;font-size:.84rem}}